im·mune  ( ĭ-my n )
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adj.1. a. Not subject to an obligation imposed on others; exempt: immune from being eliminated in a contest. b. Having legal immunity: immune from taxation. 2. Not affected by a given influence; unresponsive: immune to persuasion. 3. Immunology a. Of or relating to immunity or an immune response. b. Having resistance to a specific pathogen. c. Having or producing sensitized antibodies or lymphocytes that react to specific antigens: immune serum.
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The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
Indo-European Roots
Semitic Roots
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.
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